by RoJeC on 28 Aug 2015, 10:06
I doubt if this will ever be added as a feature.
First thing you would need is to cut the end so you have a decent transition to the new part, which means rerendering the old part. So not as easy as it may seem.
Even if it would do this a restart is likely to be causing glitches (delay of like 1ms, change in volume, shifted beat) so you would end up having to edit the join by using a sound editor anyway.
Lots of tools around to help you to join tracks if you like. Like Audicity (free). This will also show what features may be needed to make a clean join...